• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Plant & Soil Science >Effects of Rainfall Seasonal Dynamics on the Chemical Properties of the Soil of a Tropical Southern Humid Rainforest Ecosystem in Nigeria
【24h】

Effects of Rainfall Seasonal Dynamics on the Chemical Properties of the Soil of a Tropical Southern Humid Rainforest Ecosystem in Nigeria

机译：降雨季节动态对尼日利亚南部湿润热带雨林生态系统土壤化学性质的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Rainfall season changes in Nigeria affect soil chemical properties in tropical rain forest, the effect of rainfall variation on soil chemical properties depend on its intensity, duration and time. However, the report on the seasonal variation/changes in rainfall remained sketchy especially for the rainforest zone in Nigeria. Due to this, in the Southern humid rainforest in southwestern, Nigeria, assessment of seasonal changes on soil chemical properties was done. The study was done in Ala Forest Reserve in Ondo State of Nigeria in 2010, 2011 and 2012. Twenty randomly selected sampling plots were chosen at different seasons viz: January (considered as dry season), March (onset of rainy season), June-July and September (peak of rainy season) and November (waning of rainy season). At five selected locations, random sampling was done at the depth of: 0 – 5 cm, 5 – 10 cm, 10 – 15 cm and 15 – 20 cm. Soil organic matter, soil pH, available phosphorus, total nitrogen and exchangeable cations (Ca, Mg and K), increased during the peak of rainy season. Soil nitrogen, organic matter and cation exchange capacity (CEC) decreased down the profile depths. Dry season (January) and peak of rainy season (June/July and September) showed greater influence on soil chemical properties. Phosphorus content was maximum in dry season (January) and at the onset of rainy season (March). However, it remained lower at the peak of the rainy season (June-July and September). On the other hand, soil organic matter and total nitrogen were found to be low in dry season (January) as result of burning of the vegetation. At the peak of rainy season (July and September), nitrogen content increased as a result of nitrogen fixation activities. Also, the decrease in the total exchangeable bases (TEB) at the depths (10-20 cm) might be attributed to their involvement in the tissue synthesis and stem elongation at this active growth period.
机译：尼日利亚的降雨季节变化影响热带雨林的土壤化学性质，降雨变化对土壤化学性质的影响取决于其强度，持续时间和时间。但是，关于降雨的季节性变化/变化的报告仍然是粗略的，特别是在尼日利亚的雨林地区。因此，在尼日利亚西南部的南部湿润雨林中，对土壤化学特性的季节性变化进行了评估。该研究于2010年，2011年和2012年在尼日利亚翁多州的阿拉森林保护区进行。在不同的季节（即1月（被视为干旱季节），3月（雨季开始），6月- 7月和9月（雨季高峰）和11月（雨季减弱）。在五个选定的位置，在0 – 5 cm，5 – 10 cm，10 – 15 cm和15 – 20 cm的深度进行随机采样。在雨季高峰期，土壤有机质，土壤pH，有效磷，总氮和可交换阳离子（钙，镁和钾）增加。土壤氮，有机质和阳离子交换能力（CEC）在剖面深度下降。旱季（一月）和雨季高峰（六月/七月和九月）对土壤化学性质的影响更大。在干旱季节（1月）和雨季开始（3月）时，磷含量最高。但是，在雨季的高峰期（6月至7月和9月），它仍然较低。另一方面，在干旱季节（1月），由于植被燃烧，土壤有机质和总氮较低。在雨季的高峰期（7月和9月），固氮活动导致氮含量增加。同样，在深度（10-20厘米）处总可交换碱基（TEB）的减少可能归因于它们在该活跃生长期参与组织合成和茎伸长。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号